I was looking for a Pseudotropheus demasoni. I found this one in a tank that was just labeled african chichlids. I'm pretty sure it is a demasoni. Aren't there many different species of demasoni? Which one is this?
Nope, sorry, not a demasoni. You have a Metriaclima lombardoi, aka Kenyi. EXTREMELY common in "mixed African" tanks at stores. Extremely aggressive, gets larger than demasoni. Will stay blue if a female, or turn yellow over time if a male.